Re: Quick diesels?
Funny you mention 18,000m oil change intervals. A HGV mechanic pal tells me that truck fleet operators change the oil when a sample analysis indicates it's ready. With shift driving, synthetics, and presumably our silly 50 odd mph speed limit (everyone here must appreciate the 5 mile overtake routine on the motorway when towing stops you using lane 3...) this can mean 90,000m between changes!
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